<template name="goodList">
	<view class="u-wrap">
		<view class="u-menu-wrap">
			<scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view" :scroll-top="scrollTop"
			 :scroll-into-view="itemId">
				<view v-for="(item,index) in tabbar" :key="index" class="u-tab-item" :class="[current == index ? 'u-tab-item-active' : '']"
				 @tap.stop="swichMenu(index)">
					<text class="u-line-1">{{item.productName}}</text>
				</view>
			</scroll-view>
			<scroll-view :scroll-top="scrollRightTop" scroll-y scroll-with-animation class="right-box" @scroll="rightScroll">
				<view class="page-view" >
					<view class="u-flex detail-box" >
						<image :src="curItem.productUrl" style="width:140rpx;height: 140rpx;border-radius: 15rpx;" mode=""></image>
						<view class="u-flex-1 content">
							<view class="title">
								{{curItem.productName}}
							</view>
							<view class="des u-flex u-row-between">
								<view class="">
									月售{{curItem.soldUnit}}
								</view>
								<!-- <view class="">
									限购5份
								</view> -->
							</view>
							<view class="u-flex u-row-between">
								<view class="price">
									￥{{curItem.productSalePrice}}
								</view>
								<!-- <view class="">
									<u-number-box v-model="number" @change="valChange"></u-number-box>
								</view> -->
							</view>
						</view>
					</view>
					<view class="u-flex" style="margin-top: 30rpx;">
						<view class="u-flex u-flex-1">
							<image src="../../static/businessDistrict/sweet.png" style="width:26rpx;height: 26rpx;" mode=""></image>
							<view class="">可用{{curItem.sweet}}颗糖果抵用{{sweetTotalPrice}}元</view>
						</view>
						<u-checkbox style="margin-right: -26rpx;" v-model="checked" active-color="#FF6600" shape="circle"></u-checkbox>
					</view>
					<view class="buy-notice">
						<view class="heade">【购买须知】</view>
						<view class="title">
							<u-icon class="icon" name="clock" size="26rpx"></u-icon>
							使用时间</view>
						<view class="des">{{curItem.useRules}}</view>
						<view class="title">
							<u-icon class="icon" name="file-text" size="26rpx"></u-icon>
							商品详情</view>
						<view class="des" v-html="curItem.details"></view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>
<script>
	import classifyData from './classify.js'
	export default {
		name: 'goodList',
		props: {
			tabbar: {
				type: Array,
				default: () => []
			}
		},
		computed: {
			sweetTotalPrice() {
				return 	(this.curItem.productSalePrice * 100) * this.curItem.sweetDeductRate * 0.01 * 0.01
			}
		},
		data() {
			return {
				checked: true,
				number: 0,
				scrollTop: 0, //tab标题的滚动条位置
				oldScrollTop: 0,
				current: 0, // 预设当前项的值
				menuHeight: 0, // 左边菜单的高度
				menuItemHeight: 0, // 左边菜单item的高度
				itemId: '', // 栏目右边scroll-view用于滚动的id
				// tabbar: classifyData,
				menuItemPos: [],
				arr: [],
				scrollRightTop: 0, // 右边栏目scroll-view的滚动条高度
				timer: null, // 定时器
				curItem: {
				}
			}
		},
		onLoad() {
			
		},
		onReady() {
			this.getMenuItemTop()
		},
		methods: {
			valChange() {},
			// 点击左边的栏目切换
			async swichMenu(index) {
				if(index == this.current) return ;
				this.current = index;
				// 如果为0，意味着尚未初始化
				if(this.menuHeight == 0 || this.menuItemHeight == 0) {
					await this.getElRect('menu-scroll-view', 'menuHeight');
					await this.getElRect('u-tab-item', 'menuItemHeight');
				}
				// 将菜单菜单活动item垂直居中
				this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
				this.curItem = this.tabbar[index]
			},
			// 获取一个目标元素的高度
			getElRect(elClass, dataVal) {
				new Promise((resolve, reject) => {
					const query = uni.createSelectorQuery().in(this);
					query.select('.' + elClass).fields({size: true},res => {
						// 如果节点尚未生成，res值为null，循环调用执行
						if(!res) {
							setTimeout(() => {
								this.getElRect(elClass);
							}, 10);
							return ;
						}
						this[dataVal] = res.height;
					}).exec();
				})
			}
		},
		watch: {
			tabbar: {
				handler (val) {
					if (val.length > 0) {
						this.curItem = val[0] || {}
					}
				},
				immediate: true
			}
		}
	}
</script>

<style lang="scss" scoped>
	.u-wrap {
		padding-bottom: 160rpx;
		height: calc(100vh);
		/* #ifdef H5 */
		height: calc(100vh - var(--window-top));
		/* #endif */
		display: flex;
		flex-direction: column;
	}

	.u-search-box {
		padding: 18rpx 30rpx;
	}

	.u-menu-wrap {
		flex: 1;
		display: flex;
		overflow: hidden;
	}

	.u-search-inner {
		background-color: rgb(234, 234, 234);
		border-radius: 100rpx;
		display: flex;
		align-items: center;
		padding: 10rpx 16rpx;
	}

	.u-search-text {
		font-size: 26rpx;
		color: $u-tips-color;
		margin-left: 10rpx;
	}

	.u-tab-view {
		width: 200rpx;
		height: 100%;
	}

	.u-tab-item {
		height: 110rpx;
		background: #ffffff;
		box-sizing: border-box;
		display: flex;
		align-items: center;
		justify-content: center;
		font-size: 26rpx;
		color: #444;
		font-weight: 400;
		line-height: 1;
	}

	.u-tab-item-active {
		position: relative;
		color: #FF6600;
		font-size: 30rpx;
		font-weight: 600;
		background: #F6F3F3;
	}

	// .u-tab-item-active::before {
	// 	content: "";
	// 	position: absolute;
	// 	border-left: 4px solid $u-type-primary;
	// 	height: 32rpx;
	// 	left: 0;
	// 	top: 39rpx;
	// }

	.u-tab-view {
		height: 100%;
	}

	.right-box {
		background-color: rgb(250, 250, 250);
	}

	.page-view {
		padding: 16rpx 62rpx 16rpx 16rpx;
	}
	.detail-box {
		.content {
			margin-left: 20rpx;
		}
		.price {
			color: #FF6600;
			font-size: 30rpx;
		}
		.des {
			margin-top: 8rpx;
			color: #999999;
			font-size: 24rpx;
		}
	}

	.class-item {
		margin-bottom: 30rpx;
		background-color: #fff;
		padding: 16rpx;
		border-radius: 8rpx;
	}

	.class-item:last-child {
		min-height: 100vh;
	}

	.item-title {
		font-size: 26rpx;
		color: $u-main-color;
		font-weight: bold;
	}

	.item-menu-name {
		font-weight: normal;
		font-size: 24rpx;
		color: $u-main-color;
	}

	.item-container {
		display: flex;
		flex-wrap: wrap;
	}

	.thumb-box {
		width: 100%;
		display: flex;
		align-items: center;
		justify-content: center;
		flex-direction: column;
		margin-top: 20rpx;
	}

	.item-menu-image {
		width: 120rpx;
		height: 120rpx;
	}
	.buy-notice {
		.heade {
			margin-top: 12rpx;
			color: #333333;
			font-size: 26rpx;
		}
		.title {
			margin-top: 12rpx;
			color: #333333;
			font-size: 24rpx;
		}
		.icon {
			padding-right: 10rpx;
		}
		.des {
			padding-left: 40rpx;
			color: #999999;
			font-size: 24rpx;
		}
	}
</style>
